Electromagnet.



B. W. SWEET.

ELEGTROMAGNET.

APPLICATION FILED MAY 19, 1906.

90%,624. Patented Nov. 3, 1908.

uwrrnn snares rs Er an on.

. BLRTUX SWEET. OF CLEVELAND, OHIO. ASSIGXQR. BY Ml'TSNE ASSlGXMl-YXTS,'lO CENTURY TELEPHONE COXSlRIYC'lIOX LOMPAN Y, OF BUFFALO, XE: YORK. ACORPORATIOB- OF Application filed May 19, 1906.

s -(frrvahoga and State of Ohio, have invented ..'certain new and usefulImprovements in ..Elee tro1nagnets, of which the following isspecification, reference being had to the accompanying drawings, forminga part 10. thereof.

My invention relates to electro magnets, andis herein set forth asspecifically applied to annunciator drops ofthe-type having aremovablecoil or winding and armature, and

.avith restoring mechanism for actuating the shutter-drop upon theinsertion of a connectng plug 111 a corresponding spring ack .zswitch.

. The object of my invention'has been to rovidc means for removablmountin the armature. and exciting coil of a telephone an- ,nunciator,and to improve upon the structural features thereof in furtherparticulars,

which willbemadc apparent by the following 15.;Spccification.

It is a feature of much importance to be able to remove or replace adefective winding .in electroanagnetic. apparatus, without dis- .turbingsoldered connections or dismantling :0 the apparatus as mounted for use,and as ordinarily constructed, telephone annunciator drops do not easilylend then'iselves to this purpose. It is impracticable to remove thespool cz'irrying the windings from the forward to end of the annunciatordrop, and at the rear,

the armature is closely positioned ad acent to the magnetic core andshell. Accordingly, I have devised means for removably, yet sccurelyholding the armature in place, and for 40 disconnecting the magnetwinding from its associated contents, as the inner contacts of aspring-j ack switch.

Another ii'nprovement to which I may advert, is the means employed forclosing the night hell or other signaling circuit, upon the fall of theshutter-drop. These, and other 1 features ofiny invention will be morereadily understood upon making reference to the accompanying sheet. ofdrawings, as explained by the specification annexed;

Figure I'of said drawings is a view in perf spect-ive of two combinedannunciators and spring-jacks, mounted. at the left end of a bank ofsuch devices.

- 5 thereof. Fig. III, a vertical sectional View Fig. II isza face view,

ELECTRQMAGNET.

Specification of Letters Patent.

Patented Nov. 3, 1906.

Serial No. 317,732. I

through one of said appliances. Fig. IV, is a view of the devicepartially broken away, and having the armature and exciting coilsremoved. l ig. Y, is a side. view of the remov able armature andshutter-hook. Fig. (1, is a front view of the same device. FigJYII showsin pt-nspective, the removable exciting coil with its connecting-parts.Fig. VII illustrates by a rear view, a modified mount.- ing for theremovable armature; and, Fig.

IX, is a side view of this modifiedconstruction.

Throughout theseveral figures of the drawings, I have en'ip-loyed thesame characin its operative position, while upon raising said hooksindicated in the app iance upon the. right, said armature may readily beremoved as best. indicated in Fig. TY.

After the armature has been removed, the exciting-coil f, with itsconnections g, which normally are secured by screws to the terminals hof the inner contact springs of the associated jack, may in turn beremoved, and its appearance and construction may best be gathered byreferring to the perspective view thereof, Fig. VII. A s ring or latch1'. normally engages the lug provided upon the spool of saidexciting-coil, and prevents the same from being accident-ally removed ordisplaced.

At 1 is indicated the pivoted restoring device for automatically raisingthe shutterdrop m, upon the insertion of a connectingplug within thejack n, as will be well understood by those conversant with the art.Disposed beneath the shutter-drop m, but

normally out of contact therewith, when retained in its upright positionby the hook I), are two contact-springs 0, mounted in electrical contactupon the front strip p, in position to be engaged by the shutter-dropand electrically close theconnected circuit, as the night bell circuit,by means of wire g, which t, interiorly poeitioned within the isgrounded upon the insulated front p of each of the annuneietor drops. Tlniinals oi the connected eireuit, eecon are found in the springs ogrounded upon the 5 front plate and in the shutteiwlrop and itsc'onne'eted parts, which. are eleetrie-rlly united with the other dropsby the wire q. These springs, best shown in 11, ex- 1 tend freelythrough openings in the [routplate, and are adapted to be elzinipedl)O-- tween the shutter-drop and the lowe r edge of i the becl -plate u,immediately the tormer falls upon its release from the hook followingthe sending of a signal and excitation oi the. winding, thereby closingthe Connected eirouit between the parts m 0, and sounding the 5 ni htbell or other zila-rin apparatus, n Fig VIII, I have shown n removablearmature a, mounted between tn 0 renrwerdly l extending ears r, and heldin position by in interiorly engaging and relatively wide hook 3,whereby, upon the release oi e single hook, the armature may be lflOYGtlluternlly to an extent which will free the pivot {1012i the left handsupport 7', and permit the withdrawal of the armature as above phrined.l From the foregoing, it will be nderstood that the armature with itsattached hook, is made readily removable from the ninuroeiz tor dropstructure, thereby clearing the rear end of the device and permitting,the exeitl ing-coil or winding to he slipped. 'l'roui i shell 0, uponreleasing the screw (:oninrtions of the coil and its spring detent;whereupon 1 the entire construction rainy be readily inspected orrepaired, or :1 new e'oll substituted l for the one removed.

Having now desoribml the pielerred our-- hodii'nent of my invention, l.(lllllil us new, and desire to seeure 'by Letters Patent, thefollowing 1. In apparatus of the class doserilnfd, the combination withthe nctueting elertro- 1 magnet, of an iii-mature pivotnlly mounted 5ore one end thereof, supporting-ears zit gier eide oi theiii'li'lzltllle, one of said ours dotted to receive the pivotnlmounting, liOOli or hitch i'or norn'nilly retaining the armature inposition, subetuntially as set 'iorth.

2. ln zippurntus oi the class described, the coin binntion with theactuating electroinzig'net, oi slotted SH1')I)Oltll1g-Q1TS providedrearwe rdly thereof, an armature having pivotel mountingparts entering,

the slot-ted ears, and luteh-nieuhanism for retaining the zirineturereinovzibly in position before the end oi the elertronueggnet,substantially as set forth.

3. In apparatus oi the class deseril'ied,

I the combination with nu interior core and its surrounding shell, of aremovable spool can rying the magnet \\i1'i(llilj- S and adapted to heslipped upon said. core, a rearward laterallyextending part upon thespool, and n spring zuft-uzited detent iherel'or exteriorly positionedupon the shell and adapted removzibly to retain the parts in operativerelation, substantially us set lorth.

4. in apparatus oi the rinse described, the combination with aneleetro-nurgnet shell and core, oi' COHlEHL-PilltS disposed adjacentthereto, on. armature, hitch nieelnrnism reuiovzibly Lniuinting it belowthe core, :1 removable spool rurrying the exciting windand adapted to heslipped upon said (HQ, tenninnls reurn'urdly mounted upon suid spool andextending to meet the (oiltnrt-purts, and lllidllt; i'or roiuovnblysecurin; the terminals oi the spool to said eontnetparts, sulM-untinllyas set l'orth.

in testimony thnt l ('luin'i the foregoing invention, l have subscribedmy name in the preeenee ottwo witnesses at (lPVOlilllil, this 17th dayol May, A. 1). i906.

' lllilillOn" Mile E. Ciin'rnn,

,irinnn'r l iYNN limvnicxri-i.

